Hydraulic crimper tool

Patent metadata

Field	Value
Publication number	US-11685028-B2
Application number	US-202016846609-A
Country	US
Kind code	B2
Filing date	Apr 13, 2020
Priority date	Jun 15, 2015
Publication date	Jun 27, 2023
Grant date	Jun 27, 2023

Abstract

A power tool system includes a hydraulic power tool. The hydraulic power tool includes a hydraulic drive, a sensor, and a first electronic processor. The sensor is configured to detect an operational parameter of the hydraulic drive during an operation by the hydraulic drive. The first electronic processor is configured to store a plurality of data points based on the operational parameter detected during the operation and send the plurality of data points to an external device. The external device includes a display screen and a second electronic processor configured to receive the plurality of data points from the hydraulic power tool, control the display screen to display an expected data point for the operational parameter for the operation, and control the display screen to display an actual data curve based on the plurality of data points, the actual data curve overlaid on the expected data point.

First claim

What is claimed is:

1. A power tool system comprising:
a hydraulic power tool including:
a hydraulic drive including a pump and a motor configured to drive the pump,
a sensor configured to detect an operational parameter of the hydraulic drive during an operation by the hydraulic drive, and
a first electronic processor configured to
store a plurality of data points based on the operational parameter detected during the operation, and
send, via a transceiver on the hydraulic power tool, the plurality of data points to an external device; and

the external device including
a display screen;
a second electronic processor coupled to the display screen and configured to:
receive the plurality of data points from the hydraulic power tool, and control the display screen to display an expected data point for the operational parameter for the operation,
control the display screen to display an actual data curve based on the plurality of data points, the actual data curve overlaid on the expected data point,
compare the actual data curve with an expected data curve stored in the memory,
determine whether the operation of the hydraulic drive was successful in processing a workpiece based on the actual data curve and the expected data curve, and
provide an indication of whether the operation of the hydraulic drive was successful in processing the workpiece;

wherein the second electronic processor is configured to compare the actual data curve with the expected data curve by
calculating a difference value between each of a plurality of selected points of the expected data curve and corresponding points of the actual data curve, and
summing absolute values of each of the difference values to generate a cumulative difference value; and

wherein the second electronic processor is configured to determine whether the operation of the hydraulic drive was successful in processing the workpiece by
determining that the operation of the hydraulic drive in processing the workpiece was unsuccessful when the cumulative difference value exceeds a deviation threshold, and
determining that the operation of the hydraulic drive in processing the workpiece was successful when the cumulative difference value does not exceed the deviation threshold.

2. The power tool system of claim 1 , wherein the operational parameter includes one selected from the group consisting of an output pressure, a motor current, and a motor speed.

3. The power tool system of claim 1 , wherein the plurality of data points corresponds to the operational parameter detected over a crimp cycle of the hydraulic power tool.

4. The power tool system of claim 1 , wherein the second electronic processor is configured to
identify an expected curve feature in the expected data curve, the expected curve feature including one selected from a group consisting of a peak and a valley of the expected data curve;
identify an expected time period during which the expected curve feature is identified, the expected time period being shorter than a duration of the operation of the hydraulic drive;
identify an actual curve feature in the actual data curve, the actual curve feature including one selected from a group consisting of a peak and a valley of the actual data curve;
determine whether the actual curve feature occurs within the expected time period; and
wherein the electronic processor determines that the operation of the hydraulic drive was unsuccessful in processing the workpiece when the actual curve feature occurs outside the expected time period.

5. The power tool system of claim 1 , wherein the expected data curve is a first expected data curve, the second electronic processor being further configured to:
generate a first difference value representative of a first difference between the actual data curve and the first expected data curve;
generate a second difference value representative of a second difference between the actual data curve and a second expected data curve;
determine whether the first difference value exceeds the second difference value; and
identify a type of operation performed by the hydraulic drive based on the second expected data curve when the first difference value exceeds the second difference value.

6. The power tool system of claim 5 , wherein the second electronic processor is configured to
determine whether the operation of the hydraulic drive was successful in processing the workpiece based on the actual data curve and the second expected data curve when the first difference value exceeds the second difference value; and
determine whether the operation of the hydraulic drive was unsuccessful in processing the workpiece based on the actual data curve and the first expected data curve when the first difference value does not exceed the second difference value.

7. The power tool system of claim 6 , wherein the second electronic processor is configured to generate an alert on the hydraulic power tool when the operational parameter does not exceed the threshold.

8. The power tool system of claim 5 , wherein the second electronic processor is configured to determine that the operation of the hydraulic drive is unsuccessful in processing the workpiece when the first difference value and the second difference value exceed a predetermined threshold.

9. The power tool system of claim 1 , wherein the operational parameter includes an output pressure, and wherein the electronic processor is configured to
compare a maximum output pressure during the operation of the hydraulic drive to a maximum pressure threshold associated with an operation of the hydraulic power tool in successfully processing the workpiece; and
generate, via an indicator on the hydraulic power tool, an indication that the operation of the hydraulic drive was successful in processing the workpiece when the maximum output pressure exceeds the maximum pressure threshold.

10. A power tool system comprising:
a hydraulic power tool including:
a hydraulic drive including a pump and a motor configured to drive the pump,
a sensor configured to detect an operational parameter of the hydraulic drive during an operation by the hydraulic drive, and
a first electronic processor configured to
store a plurality of data points based on the operational parameter detected during the operation,
send, via a transceiver on the hydraulic power tool, the plurality of data points to an external device; and

the external device including
a display screen;
a second electronic processor coupled to the display screen and configured to:
receive the plurality of data points from the hydraulic power tool, and control the display screen to display an expected data point for the operational parameter for the operation,
control the display screen to display an actual data curve based on the plurality of data points, the actual data curve overlaid on the expected data point,
compare the actual data curve with an expected data curve stored in the memory,
determine whether the operation of the hydraulic drive was successful in processing a workpiece based on the actual data curve and the expected data curve, and
provide an indication of whether the operation of the hydraulic drive was successful in processing the workpiece,

wherein the second electronic processor is configured to compare the actual data curve with the expected data curve by
identifying an expected curve feature in the expected data curve, the expected curve feature including one selected from a group consisting of a peak and a valley of the expected data curve,
identifying an expected time period during which the expected curve feature is identified, the expected time period being shorter than

Assignees

• Milwaukee Electric Tool Corp

Inventors

• Kanack Kris
• Kehoe Sean T
• Bovard Paige
• Huber Alex

Classifications

• B21D39/048

  using presses for radially crimping tubular elements · CPC title

• B25B27/10

  inserting fittings into hoses · CPC title

• B25B23/1456 Primary

  having electrical components · CPC title

• H01R43/0427

  fluid actuated hand crimping tools · CPC title

• B23D17/06

  actuated by fluid or gas pressure · CPC title